SendMail 8.12.2 and Qpopper

Hi, I'm new in the mailing list and i don't consider myself as a Linux expert, but i'm willing to try. I' d like to know if anyone has tried SendMail ver. 8.12.2. We are running SendMail ver. 8.11 at the moment. Does it worth an update? We are also running Popper instead of Qpopper. In your opinion are there differences that should make us to choose Qpopper? Thanks in advance, i remain...